API StringBuffer类例子

 package cn.zmh.Buffer;

 public class StringBufferDemo {
     public static void main(String[] args) {
         print3();
     }
     //append将任意类型添加到缓冲区
     public static void print(){
         StringBuffer bu = new StringBuffer();
         bu.append(65).append("jfkajlf").append(true).append(10.5464);
         System.out.println(bu);
     }
     //删除的时候结尾位置减去1；
     public static void print1(){
         StringBuffer bu = new StringBuffer();
         bu.append("hslaskf");
         bu.delete(1,3);
         System.out.println(bu);
     }
     //insert插入
     public static void print2(){
         StringBuffer bu = new StringBuffer();
         bu.append("hello");
         bu.insert(2,"你好");
         System.out.println(bu);
     }
     //replace 替换
     public static void print3(){
         StringBuffer bu = new StringBuffer();
         bu.append("杰克逊每天都练舞蹈");
         bu.replace(0,3,"mary");//替换
         System.out.println(bu);
     }
     //reverse 反转
     public static void print4(){
         StringBuffer bu = new StringBuffer();
         bu.append("我爱我家");
         bu.reverse();
         System.out.println(bu);
     }
     //toString
     public static void print5(){
         StringBuffer bu = new StringBuffer();
         bu.append("我喜欢在白纸上画画 画出我笨拙的自由");
         bu.append(156464464);
         String s = bu.toString();
         System.out.println(s);
     }

 }